{
  "id": "0902.1773",
  "version": "v1",
  "published": "2009-02-10T23:18:58.000Z",
  "updated": "2009-02-10T23:18:58.000Z",
  "title": "A large C+N+O abundance spread in giant stars of the globular cluster NGC 1851",
  "authors": [
    "David Yong",
    "Frank Grundahl",
    "Francesca D'Antona",
    "Amanda I. Karakas",
    "John C. Lattanzio",
    "John E. Norris"
  ],
  "comment": "Accepted for publication in ApJ Letters",
  "doi": "10.1088/0004-637X/695/1/L62",
  "categories": [
    "astro-ph.SR",
    "astro-ph.GA"
  ],
  "abstract": "Abundances of C, N, and O are determined in four bright red giants that span the known abundance range for light (Na and Al) and s-process (Zr and La) elements in the globular cluster NGC 1851. The abundance sum C+N+O exhibits a range of 0.6 dex, a factor of 4, in contrast to other clusters in which no significant C+N+O spread is found. Such an abundance range offers support for the Cassisi et al. (2008) scenario in which the double subgiant branch populations are coeval but with different mixtures of C+N+O abundances. Further, the Na, Al, Zr, and La abundances are correlated with C+N+O, and therefore, NGC 1851 is the first cluster to provide strong support for the scenario in which AGB stars are responsible for the globular cluster light element abundance variations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-02-10T23:18:58.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "globular cluster ngc",
      "giant stars",
      "abundance spread",
      "cluster light element abundance variations",
      "globular cluster light element abundance"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2009,
      "month": "Apr",
      "volume": 695,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 813033,
      "adsabs": "2009ApJ...695L..62Y"
    }
  }
}